Origin: OCPBUGS-18179

Customer found out that the cluster-backup.sh script was not able to run because etcdctl was built with a different rhel version (rhel8 vs rhel9). 

We didn't know this was broken in FIPS, so we should add a FIPS job to test our e2e-operator workflow that uses that script during the 4.14 backup tests.

Since we regressed here in 4.13, we should add another simple test to run the script and check whether it succeeded and outputted a snapshot correctly. 

AC:

• new FIPS-based e2e-operator test setup in CI (4.14 / 4.13)
• new e2e test in CEO that executes the backup script and checks whether it runs correctly (4.14 optional, but definitely for 4.13)
• all tests pass